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OrionWelders.com
Keeping the weld time at its max will leave the weld looking smooth and clean .
Using a more technical description – during the welding process the weld spot becomes a liquid
pool of metal . The impact of the welding plasma causes vibrations on the molten pool’s surface,
much like a stone causes ripples on the surface of a still body of water . The Orion welder’s energy
discharge has been designed to ramp down the weld energy for longer weld time . This gives the
molten metal vibrations time to smooth out before the metal re-solidifies .
*It is recommended
that the user keep the time at its max length for most welding applications .
In addition, a longer weld time will also help prevent cracking in
some metals as the extended time and longer discharge curve
allows the molten pool to cool more slowly . When the energy
is cut off suddenly (by shortening the time setting) the liquid
metal “freezes” in place . This rapid freezing can cause micro
stresses in the weld spot and may make the metal more prone
to cracks under additional stress (like hammering) .
In most cases it is recommended to leave the weld time at max
length with one important exception . If welding a very small
part at less than 5 Ws of energy, it is very helpful to turn down
the time . By turning down the time the arc will still ignite easily
but the energy that the welder allows out during the weld is
limited by the shorter amount of time . The larger weld in this
image was done at 5 Ws and 15 Ms time . The smaller weld on
the right was done at 5 Ws and 3 Ms time .
Alternatively, the user can sharpen the welding tip to a very fine point to help ignite the
welding arc at very low energy levels .
HANDS ON: Try making a small weld spot using 5 Ws of energy and maximum length, and
then 5 Ws of energy and minimum length . Now, with a very sharp electrode, try making a weld
spot at 1-3 Ws of energy and maximum length .